College of Chemical and Environmental Engineering;
Shandong University of Science and Technology;
Qingdao 266590;
China;
Key Laboratory of Marine Chemistry Theory and Technology;
Ministry of Education;
College of Chemistry and Chemical Engineering;
Ocean University of China;
Qingdao 266100;
China;
electrodialysis; seaweed extracts; mercury removal; response surface methodology; Box-Behnken design;